You can first ask clearly what your friend's parents like and need on a daily basis, and then choose a gift based on these two points.
We recommend that you choose practical gifts for elders. Elderly people generally don't like gifts that are too flashy and extravagant.
You can give your friend's parents tea, cigarettes, alcohol, and other gifts that are generally presentable and can be used.
You can also give warm underwear, cotton shoes, scarves and other gifts that make you feel warm.
The most important thing is to include your friend's thoughts about his parents in the gift. The key to giving a gift is to make your friend's parents feel warm.